African countries will vote overwhelmingly for Sepp Blatter in this year’s Fifa presidential election, senior officials said on Tuesday.

“Africa is solidly behind Blatter. You will find he is very popular on the continent,” said Kwesi Nyantakyi, the president of the Ghana FA and a Confederation of African Football (Caf) executive committee member.

Blatter faces four challengers in his bid for re-election on 29 May, when he seeks a fifth term as president, which would take him past his 80th birthday.

“The continent is united behind him,” added the former South African FA president Molefi Oliphant, who still serves on the Caf executive. “We made a formal endorsement of his candidacy last year at our meeting in Rio de Janeiro already.”

Previous endorsements from Caf, however, have not necessarily translated into votes. African football’s controlling body promised Lennart Johansson a block of votes in 1998 but member associations took no heed and helped Blatter to victory. In 2002, the Caf president, Issa Hayatou, failed to muster significant support from his own continent and lost heavily by 139-56 votes at the Fifa congress in Seoul.

Affection for Blatter stems from the generous financial assistance he has given Africa during his 17-year tenure. “He has done a lot for the continent. It is he who has set up the financial assistance programmes and who through the Goal project has built infrastructure in all of the countries,” added Nyantakyi.

“The Europeans don’t understand that. They say it is not his own money but Fifa’s but that’s not the point. He is the one who set up all the assistance programmes that have helped boost African football.”

Goal is Blatter’s pet project, inaugurated not long after he came to power in 1998. It has built training centres, accommodation, pitches and offices for cash-strapped associations.

Under Fifa’s financial assistance programme, introduced in 2001, each of the ruling body’s 209 member associations receive generous grants with more than $1bn (£660m) paid out during Blatter’s tenure.

Prince Ali has welcomed Van Praag’s decision to enter the presidential race, describing him as a “credible candidate” who will add to the debate about the future of world football’s governing body. “We welcome other credible colleagues from the football family who want to join a genuine debate about the future of Fifa,” Prince Ali said in a statement on Tuesday.

“This election campaign is not about personalities, it is about what is in the best interests of football and the world governing body of the game going forward. It is good for democracy that Michael van Praag has made this announcement.”